Abstract: A purification method for a copper foil, which belongs to the field of material purification. The purification method for a copper foil comprises: placing an assembly in a central temperature zone of a tubular furnace, and annealing same for at least 5 h in a mixed atmosphere of an inert gas and hydrogen under the condition that the temperature of the central temperature zone is maintained at 1050-1070° C., so as to obtain a purified single-crystal copper foil, wherein the assembly is composed of a polycrystalline copper foil containing impurities and a carrier supporting the polycrystalline copper foil, the polycrystalline copper foil is a rolled copper foil, the flow of the inert gas is 500-600 sccm, and the flow of the hydrogen is 30-100 sccm.

Abstract: A biomimetic tower climbing robot and a tower climbing method thereof are provided. The robot mainly includes a main control body module and clamping and moving mechanism modules; two ends of the main control body module are connected to one clamping and moving mechanism module through an elastic universal joint respectively, two clamping and moving mechanism modules can alternately lock and unlock an anti-fall track of an iron tower, and the main control body module alternately pushes the clamping and moving mechanism module at its upper end upwards and pulls the clamping and moving mechanism module at its lower end upwards to achieve climbing of the robot along the anti-fall track.

Abstract: Disclosed is a ring cutting tool for large cables including an installation component having a base and a middle support; an adjustment component at the support's bottom, the adjustment component includes an adjustment seat located at the bottom of the support, a scale component set inside the adjustment seat and a feeding component positioned inside and outside the adjustment seat; and a ring cutting component positioned at the bottom of the adjustment seat, the ring cutting component includes a drive component positioned between the base and the support, a cutting blade positioned at the bottom of the adjustment seat, and a locking component positioned inside the cutting blade. These components and the ring cutting component arrangement allow the device to automatically advance the cutting blade when cutting cable insulation, which not only reduces the cutting pressure of the device but also prevents damage to the interior of the cable.

Abstract: Disclosed is a continuous conduit apparatus based on guiding and injecting integrated mechanism, which comprises a straightening apparatus and a pair of sprocket and chain clamping assemblies. The pair of sprocket and chain clamping assemblies are configured to clamp the conduit and pull the conduit to go downwards a well or upwards a lifting direction. Between the pair of sprocket and chain clamping assemblies, a conduit guide channel applied for the conduit to passing through is formed. An inlet and an outlet of the conduit guide channel are not situated in a straight line, and the straightening apparatus are configured to straighten the conduit. Each of the two sprocket and chain clamping assemblies comprises a sprocket set, a chain, a plurality of clamping blocks mounted on the chain, and a pushing plate configured to press the clamping blocks.

Abstract: Disclosed is a continuous conduit operation apparatus, which comprises a folding frame and a guiding and injecting integrated mechanism configured to pull the conduit to go downwards a well or upwards a lifting direction. The folding frame comprises a base, a mounting frame connected to the base in a movable connection, and a telescopic mechanism configured to rotate the mounting frame in a vertical plane around a position of the movable connection. One end of the telescopic mechanism is movably connected to the base, another end of the telescopic mechanism is movably connected to the mounting frame. The guiding and injecting integrated mechanism is arranged on the mounting frame. The present disclosure integrates the guiding function and the injection function to reduce the height of the apparatus and is suitable for operation environment with limited space and height.

Abstract: This application provides a die package structure including a package substrate, a die, and a first package body. The package substrate has a first surface and a second surface opposite each other. The die is coupled to the package substrate, and the die has a hotspot. A heat dissipation connection point is disposed on the first surface of the package substrate, and a heat conduction channel that communicates the heat dissipation connection point with the hotspot is formed in the package substrate. A first connection terminal for connecting to an external device is disposed on the second surface. The first package body is disposed on the first surface, a heat conduction structure is formed in the first package body, and the heat conduction structure extends from the heat dissipation connection point to a surface of the first package body.

Abstract: Provided is an isolated binding protein including an antigen binding domain binding to an NS1 protein, and comprising specific heavy chain CDR and light chain CDR. The binding protein can specifically identify and bind to NS1, and has relatively high sensitivity and specificity, so as to detect dengue virus. Moreover, the binding protein does not need to be produced by injecting hybridoma cells into mouse peritoneal cavity, while simplifying production, thus stabilizing antibody functionality.

Abstract: Disclosed in the present disclosure is a double-deck multi-span bridge construction method. According to the double-deck bridge construction method of the present disclosure, construction is carried out by using a method of disassembling a support jig frame in a graded and span-separated mode, an upper chord jig frame and a lower chord jig frame can be used in a recycle manner, and construction costs are reduced. In addition, a construction period of building the support jig frame is shortened, and other construction operations can be synchronously carried out on a span in which the jig frame is disassembled, for example, fire retardant coating construction can be carried out on a mounted bridge deck after the jig frame is disassembled, and the construction period of a double-deck multi-span bridge is effectively shortened.

Abstract: A driving system for a core drilling rig has a driving motor. The driving motor has an outer rotor and an inner stator, and mutually-matched convex ribs are provided on the inner wall of the outer rotor and the outer wall of the inner stator. The outer rotor and the inner stator are in clearance fit. A clearance between the outer rotor and the inner stator is a driving liquid channel. The length of the outer rotor is less than that of the inner stator. The outer rotor is provided between the front and rear ends of the inner stator. The outer rotor is connected to an outer cylinder. The rear end of the inner stator is connected to a coupling.

Abstract: A drilling fluid channel structure of a core drilling rig includes a fluid channel activation module, a pressure relief module, a flow diverging and blocking module, a driving fluid channel and a cooling fluid channel. The fluid channel activation module, the pressure relief module and the flow diverging and blocking module are connected sequentially from the rear to the front. The driving fluid channel and the cooling fluid channel are connected at the rear side thereof to the flow diverging and blocking module. The driving fluid channel includes a driving section located between a stator and a rotor of a driving motor. The driving fluid channel is provided with a driving fluid outlet at the front side of the driving section. The cooling fluid channel passes through a layer disposed between an integrity-preserving compartment and an outer barrel.

Abstract: A core sampling and preservation system comprises the following sequentially connected modules: a drive module (300), a preservation module (200) and a core sampling module (100). The core sampling module (100) comprises a core drilling tool and a core sample storage compartment. The preservation module (200) comprises a core sample preservation container. The drive module comprises a core drill having a liquid channel. The core sample preservation container comprises an inner core barrel (28), an outer core barrel (26) and an energy storage device (229). The outer core barrel (26) is sleeved onto the inner core barrel (28). An upper end of the inner core barrel (28) is in communication with a liquid nitrogen storage tank (225). The liquid nitrogen storage tank (225) is positioned inside the outer core barrel (26). The energy storage device (229) is in communication with the outer core barrel (26). The outer core barrel (26) is provided with a butterfly valve (23).

Abstract: Disclosed is a magnetic pressure retaining control device, which comprises: a valve seat, a magnetic valve cover, and a trigger magnetic member for repelling the magnetic valve cover; the magnetic valve cover and an open end of the valve seat are movably connected; when the magnetic valve cover is in an open state, the trigger magnetic member is opposite to an end surface of the magnetic valve cover away from an inside of the valve seat. A cylindrical magnet is also arranged in the valve seat. By the magnetic between the trigger magnet and the magnetic valve cover, and the magnetic between the magnetic valve cover and the valve seat, a reliable guarantee for the closure between the magnetic valve cover and the valve seat is provided. The valve seat and the valve cover are tightly closed under different conditions.

Abstract: A system for the in-situ retained coring of a rock sample has a driving module (300), a retaining module (200), and a coring module (100) which are connected in sequence. The coring module (100) includes a rock core drilling tool and a rock core sample storage cylinder, the retaining module (200) includes a rock core sample retaining compartment. The driving module includes a coring drill machine that has a drill machine outer cylinder unlocking mechanism. The rock core drilling tool includes a coring drill tool, a core catcher (11), and an inner core pipe (12). The coring drill tool has an outer core pipe (13) and a hollow drill bit (14). The rock core sample retaining compartment has an inner coring cylinder (28), an outer coring cylinder (26), and an energy accumulator (229).

Abstract: An antibody against a novel coronavirus, and a reagent and a kit for detecting the novel coronavirus, which relate to the technical field of antibodies. The antibody against the novel coronavirus includes a heavy chain complementarity determinant region and a light chain complementarity determinant region. The antibody has good affinity for N protein of the novel coronavirus, and has good sensitivity and specificity for detecting the novel coronavirus. Antibody options are provided for detection of the novel coronavirus.

Abstract: Disclosed is a guiding and injecting integrated mechanism for continuous conduit, belonging to underground exploration technical field. The mechanism comprises a pair of chain wheel and chain clamping assemblies used for clamping conduit and pulling conduit to go down or out of well. A conduit guiding channel for conduit to pass through is formed between the pair of chain wheel and chain clamping assemblies, and an inlet and an outlet of the conduit guiding channel are not situated in line. The conduit guiding channel is arc-shaped and each of the two chain wheel and chain clamping assemblies comprises a chain wheel set, chains, clamping blocks mounted on the chain, and a pushing plate for pressing the clamping blocks. Further, clamping surfaces of the clamping blocks have a certain curvature with respect to guiding direction.

Abstract: Disclosed is a continuous conduit apparatus based on guiding and injecting integrated mechanism, which comprises a straightening apparatus and a pair of sprocket and chain clamping assemblies. The pair of sprocket and chain clamping assemblies are configured to clamp the conduit and pull the conduit to go downwards a well or upwards a lifting direction. Between the pair of sprocket and chain clamping assemblies, a conduit guide channel applied for the conduit to passing through is formed. An inlet and an outlet of the conduit guide channel are not situated in a straight line, and the straightening apparatus are configured to straighten the conduit. Each of the two sprocket and chain clamping assemblies comprises a sprocket set, a chain, a plurality of clamping blocks mounted on the chain, and a pushing plate configured to press the clamping blocks.

Abstract: The application relates to an HCV recombinant antigen and a mutant thereof. The application provides an HCV recombinant antigen, the HCV recombinant antigen including at least 1 NS3 antigen, wherein at least one cysteine of the NS3 antigen in positions 1192-1517 of an HCV amino acid sequence is mutated into G and/or A, and preferably mutated into A. The application further provides a nucleic acid encoding the HCV recombinant antigen, an expression vector including the nucleic acid, a host cell including the expression vector, a conjugate including the HCV recombinant antigen, and a kit including the HCV recombinant antigen.

Abstract: The present disclosure relates to an HCV recombinant antigen and use of the same. Provided is an HCV recombinant antigen, which includes at least two NS3 antigens, at least one NS4 antigen, and at least one core antigen. Further provided are a nucleic acid encoding the HCV recombinant antigen, an expression vector containing the nucleic acid, a host cell containing the expression vector, a conjugate containing the HCV recombinant antigen, and a kit containing the HCV recombinant antigen, and the like.

Abstract: A coring device has core drilling tool, a core catcher, a rock core barrel, a drilling machine outer cylinder, a flap valve and an inner rod for pulling the rock core barrel. The core catcher is provided inside the lower end of the rock core barrel. The core drilling tool includes an outer core tube and a hollow drill bit. The upper end of the outer core tube is connected to the lower end of the drilling machine outer cylinder. The lower end of the outer core tube is connected to the drill bit. The lower end of the inner rod protrudes into the rock core barrel and is movable axially by a certain distance relative to the rock core barrel. The flap valve includes a valve seat and a sealing flap. The valve seat is coaxially mounted on the inner wall of the drilling machine outer cylinder.

Abstract: A drilling control mechanism of a core drilling rig has a tooth drill and a core drilling rig. The core drilling rig is inside the tooth drill and engages with the drill in a sliding manner. A locking recess is formed at an inner wall of the tooth drill. A locking latch recess is formed at an outer wall of the core drilling rig and has a locking latch therein. The locking latch has a spring. When the locking recess is directly opposite the locking latch recess, the spring extends and the locking latch partially enters the locking recess. The core drilling rig has a central rod, a fluid channel activation module, an outer barrel, and outer barrel unlocking module and a flow diverging module. The central rod passes through the inner cavities of the fluid channel activation module, the outer barrel unlocking module and the flow diverging module.